package com.gek.picturebackend.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.crypto.digest.DigestUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gek.picturebackend.enums.UserRoleEnum;
import com.gek.picturebackend.exception.BusinessException;
import com.gek.picturebackend.exception.ErrorCode;
import com.gek.picturebackend.mapper.UserMapper;
import com.gek.picturebackend.model.domain.User;
import com.gek.picturebackend.model.dto.UserQueryRequest;
import com.gek.picturebackend.model.mapstruct.UserConvert;
import com.gek.picturebackend.model.mapstruct.UserVOConvert;
import com.gek.picturebackend.model.vo.LoginUserVO;
import com.gek.picturebackend.model.vo.UserVO;
import com.gek.picturebackend.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

import static com.gek.picturebackend.constants.UserConstant.USER_LOGIN_STATE;

/**
* @author tester
* @description 针对表【user(用户)】的数据库操作Service实现
* @createDate 2024-12-17 11:41:09
*/
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User>
    implements UserService{

    @Override
    public long userRegister(String userAccount, String userPassword, String checkPassword) {
        // 校验
        if(StrUtil.hasBlank(userAccount, userPassword, checkPassword)){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"参数为空");
        }
        if(userAccount.length() < 4){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"用户账号过短");
        }
        if(userPassword.length() < 8 || checkPassword.length() < 8){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"用户密码过短");
        }
        // 密码和校验密码相同
        if(!userPassword.equals(checkPassword)){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"两次输入密码不一致");
        }
        // 账户不能重复
        long count = lambdaQuery().eq(User::getUserAccount, userAccount).count();
        if(count > 0){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"账号重复");
        }
        //加密
        String encryptPassword = getEncryptPassword(userPassword);
        User user = new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        user.setUserName(userAccount);
        user.setUserRole(UserRoleEnum.USER.getValue());
        boolean save = this.save(user);
        if(!save){
            throw new BusinessException(ErrorCode.SYSTEM_ERROR,"注册失败");
        }
        return user.getId();
    }

    @Override
    public String getEncryptPassword(String userPassword) {
        final String salt = "gek";

        return DigestUtil.md5Hex(userPassword + salt);
    }

    @Override
    public User getLoginUser(HttpServletRequest request) {
        User user = (User) request.getSession().getAttribute(USER_LOGIN_STATE);
        if(user == null || user.getId() == null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        long id = user.getId();
         user = this.getById(id);
        if(user == null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return user;
    }


    @Override
    public LoginUserVO userLogin(String userAccount, String userPassword, HttpServletRequest httpServletRequest) {
        // 校验
        if(StrUtil.hasBlank(userAccount, userPassword)){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"账号或者密码为空");
        }
        if(userAccount.length() < 4){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"用户账号过短");
        }
        if(userPassword.length() < 8){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"用户密码过短");
        }
        // 加密
        String encryptPassword = getEncryptPassword(userPassword);
        User user = lambdaQuery().eq(User::getUserAccount, userAccount).eq(User::getUserPassword, encryptPassword).one();
        if(user == null){
//            log.info(userAccount+"用户不存在或密码错误");
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户不存在或密码错误");
        }
        httpServletRequest.getSession().setAttribute(USER_LOGIN_STATE,user);
        return UserConvert.loginVOConvert.useToLoginUserVO(user);
//        return this.getLoginUserVO(user);
    }

    @Override
    public boolean userLogout(HttpServletRequest httpServletRequest) {
        User user = (User) httpServletRequest.getSession().getAttribute(USER_LOGIN_STATE);
        if(user==null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        httpServletRequest.getSession().removeAttribute(USER_LOGIN_STATE);
        return true;
    }

    @Override
    public List<UserVO> getUserVOList(List<User> userList) {
        if(CollUtil.isEmpty(userList)){
            return new ArrayList<>();
        }
        return userList.stream().map(UserVOConvert.userVOConvert::userToUserVo).collect(Collectors.toList());
    }

    @Override
    public QueryWrapper<User> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String userAccount = userQueryRequest.getUserAccount();
        String userName = userQueryRequest.getUserName();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(ObjUtil.isNotNull(id), "id", id);
        queryWrapper.eq(StrUtil.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StrUtil.isNotBlank(userAccount), "userAccount", userAccount);
        queryWrapper.like(StrUtil.isNotBlank(userName), "userName", userName);
        queryWrapper.like(StrUtil.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.orderBy(StrUtil.isNotEmpty(sortField), sortOrder.equals("ascend"), sortField);
        return queryWrapper;
    }


}




